/* ============================================================================
   SPURA HUB v3 — Components (Buttons, Cards, Tables, Forms, Modals)
   ============================================================================ */

/* ─── Buttons ─────────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4375rem;
    padding: 0.5625rem 1.0625rem;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: -.01em;
    line-height: 1.4;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
    font-family: var(--font-sans);
}
.btn:hover { text-decoration: none; }
.btn:focus-visible {
    outline: 2px solid var(--brand-500);
    outline-offset: 2px;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Primario — Inversión inteligente de contraste (Oscuro en light, Claro en dark) */
.btn-primary {
    background: var(--text-primary);
    color: var(--bg-surface);
    border-color: transparent;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Accent — teal de marca */
.btn-accent {
    background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-sm);
}
.btn-accent:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
    box-shadow: var(--shadow-md);
}

/* Secundario — outline refinado */
.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--border-color-strong);
    box-shadow: var(--shadow-xs);
}
.btn-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--text-muted);
}

/* Ghost */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Danger */
.btn-danger {
    background: var(--danger-500);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-sm);
}
.btn-danger:hover:not(:disabled) { background: var(--danger-600); }

/* Success */
.btn-success {
    background: var(--success-500);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-sm);
}
.btn-success:hover:not(:disabled) { background: var(--success-600); }

/* Tamaños */
.btn-sm { padding: 0.3125rem 0.6875rem; font-size: 0.8125rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-icon {
    width: 34px; height: 34px;
    padding: 0;
    justify-content: center;
}

/* ─── Cards ───────────────────────────────────────────────────────────── */

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow .2s ease;
}
.card:hover { box-shadow: var(--shadow-md); }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}
.card-title { font-size: 0.9375rem; font-weight: 600; letter-spacing: -.01em; color: var(--text-primary); }
.card-body { padding: 1.25rem; }
.card-footer {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

/* Variante con acento de color (para métricas destacadas) */
.card-accent {
    border-top: 2px solid var(--brand-500);
}
.card-accent-success { border-top: 2px solid var(--success-500); }
.card-accent-warning { border-top: 2px solid var(--warning-500); }
.card-accent-danger  { border-top: 2px solid var(--danger-500); }

/* ─── Data Table ──────────────────────────────────────────────────────── */

.data-table {
    width: 100%;
    border-collapse: collapse;
}
.data-table thead th {
    padding: 0.625rem 1rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    white-space: nowrap;
}
.data-table tbody td {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    color: var(--text-primary);
}
.data-table tbody tr { transition: background .1s; }
.data-table tbody tr:hover td { background: var(--bg-secondary); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ─── Stats Cards ─────────────────────────────────────────────────────── */

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.375rem;
    box-shadow: var(--shadow-xs);
    transition: box-shadow .2s;
}
.stat-card:hover { box-shadow: var(--shadow-sm); }

.stat-card-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .04em;
    margin-bottom: 0.375rem;
}
.stat-card-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -.03em;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 0.375rem;
}
.stat-card-change {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}
.stat-card-change.positive { color: var(--success-600); }
.stat-card-change.negative { color: var(--danger-500); }

/* ─── Content Grid ────────────────────────────────────────────────────── */

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.25rem;
}

/* ─── Page Header ─────────────────────────────────────────────────────── */

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.page-header-title {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -.025em;
    color: var(--text-primary);
}
.page-header-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}
.page-header-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* ─── Modal ───────────────────────────────────────────────────────────── */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}
.modal {
    background: var(--bg-surface);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.125rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.modal-title { font-size: 1rem; font-weight: 600; letter-spacing: -.01em; color: var(--text-primary); }
.modal-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px; height: 30px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all .15s;
}
.modal-close:hover { background: var(--bg-secondary); color: var(--text-primary); }
.modal-body { padding: 1.5rem; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ─── Form Group ──────────────────────────────────────────────────────── */

.form-group { margin-bottom: 1.125rem; }

/* ─── Tabs ────────────────────────────────────────────────────────────── */

.tabs-bar {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0;
}

.tab {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: all 0.15s ease;
    background: transparent;
    cursor: pointer;
}
.tab:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}
.tab-active {
    color: var(--brand-600);
    border-bottom-color: var(--brand-600);
    background: var(--bg-surface);
    font-weight: 600;
}
.tab-active:hover {
    color: var(--brand-600);
}

/* ─── Toast ───────────────────────────────────────────────────────────── */

.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}